Improvement in the manufacture of gunpowder



return-11mm)v eme, or sr. ru'rnnsnene, RUSSIA, ,A'ssienon To nnuuofnorramnu, or" SAME PLACE.

lmeuovsmau'r INTHE'MAN P T NT OFFICE;

uFAcTueE or emporium.-

Specific ation forming part oi Letters Patent No, i lsam dwm Match 10,1874; application filed January .To all whom it'may concern Be it knownthat I, B RNHARD WIeNjnu, of St. Petcrsburg, Russia, colonel ofartillery, have invented or discovered certain new and; usefulImprovements in the lilanut'acture of Gunpowder; and I do hereby declarethat the following is a full, clear,-and exact description thereof-thatis to sa v This invention consists in the manufacture ewcierlryavhat" Iare the dry-Way.

Instead of addinga certain quantity of water to the ingredients-saltpeter, sulphur, and charcoal, as in the ordinary mode ofmanufacture-after they have been mixed together in themixing barrels ortubs, Isubmit the mixture, in a dry or unwetted state, to the action ofa press, heated,-preierably, by steam, to about 250 Fahrenheit (120 'centi grade.) Under this temperature the sulphur melts and becomesthoroughly distributed throughout the mix-j" ture, thereby transformingthe same into a compact black calre, perfectly homogeneous.

Prismatic or any other special kind otpowder, of which each single grainrequires to be pressed, is made by bringing the mixture from the mixingbarrels or tubs directly into hot powder-presses, which produce grainsof the desired form and size.

Granular powder is made by comminuting the dry paste or cake, and bythen assorting and dusting the grains. Drying and glazing areunnecessary. v

By the manufacture of gunpowder in the manner above described I obtainthe follow-- I i ng advantage Ifirst, the eli'ect of the pow- 1161ll1ll00l7lllgl$ more uniformsecond, the v ;rams, although of an inferiorspecific gravity,-"are of lirlnerconsistence; third, the pew du-attracts scarcely halt the moisture at tracted by" powder-made in thewetwa; fourth, the destructive or wearing efi'ectbn the guns is much.diminished; fifth, the man'- ufacture is less complicatedi l quick-er;'ai'i'd' frcfiuirslcss lia u s, 1 depend on the weather, nor is it intoThe powder-cellars, while the ordinary vmethod requires about a week,and necessitates large accumulations in the dryingll'01m(;-

W natIlclaim, and desire to secure by Letters Patent, 'is-+ aid ofmoisture, by subjecting the ingredients, alter 'nnxture,-to atemperature sufficient to the mass, substantially as set forth.

' 1L4, 0n ll'llssily J. KOS,

dered'by hard frost; sixth, the ingredients are transtormed in one dayinto gunpowder readyfor use, wlnchca'n, in the evening, he removed;

The improved method, herein described, for the nmnulhcturc of gunpowderwithout the liquefy the sulphur and cause it to agglutinate 1i. IENER,

, Between the 15th and 16th line, No.

